Make TooltipDialog class parameter work correctly (being added to the node rather than replacing the baseClass, dijitTooltipDialog.
Make TooltipDialog class parameter work correctly (being added to the node rather than replacing the baseClass, dijitTooltipDialog.

Extension of work from [14624].  Fixes #8590.  !strict

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@16576 560b804f-0ae3-0310-86f3-f6aa0a117693

redaktor/deliteful